This has been addressed by the horde team but someone who feels the motivation might want to add a patch that corrects this small error. It causes the Free/Busy View to simply contain nothing Reproducible: Always Steps to Reproduce: 1. 2. 3. Actual Results: Free/Busy does not contain information Expected Results: Display Free/Busy information for invited users
horde-3.0.4-r1 has this patch now